Solar system

Asteroids, comets, meteorites, stars, and constellations

Asteroids

Asteroids are minor planets, especially those of the inner solar systems. The larger ones have also been called planetoids.


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Comets and Meteorites

Comets are relatively small, fragile, irregularly shaped bodies and, like asteroids, they are left over from the solar system formation process. Comets, however, are icy dirtballs that form in the outer solar system. The icy surface is embedded with dust, grit and particles from space.


While traveling through space, asteroids sometimes collide with each other and break up into smaller fragments. Comets shed dust as they roam the solar system. These 'break ups' result in numerous small particles and fragments, called meteoroids, which orbit the sun.